Joint for soft-metal pipes



(No Model.)`

W. A.. HENDERSON.

JOINT FOR. SOFT METAL PIPES. N0'. 396,654. Patented Jan. 22, 1889.

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Infanta j sb; am

PATENT NEEMSE.

j 'WILLIAM A. HENDERSON, or MALDEN, MASSACHUSETTS.

.JOINT4 FOR SOFT-METAL PIPES.

SPECIFICATION forming part of Letters Patent No. 396,654, dated January 22, 1889.` Application filed January 2G, 1885i Serial No.154,079. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM A. HENDER- SON, a citizen of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts, have invented a new and useful Joint for SofteMetal Pipes, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to an improved joint for the ends of pipes of lead or other fusible metal; and it consists in a joint formed by fusing the pipes at their ends while the ends are in juxtaposition, the molten metal being prevented from flowinwithin the pipes, substantially as hereinafter set forth.

In the drawings, Figure l is a front view of an apparatus for carrying out my invention. Fig. 2 is a side view of the same. Fig. is a central vertical. section taken on line l 1in Fig. 2. Fig. e is a central vertical section taken on line 2 2 in Fig. l.

Let A and B be two pipes, of lead or other fusible metal, the ends of which are to be united at a. These ends are faced off so that they may be brought against each other in close juxtaposition. .lefore pi'itting the ends together a short shell or tube, C, is placed within the pipes, fitting the same and so as to come under the joint at a. The object of this shell or tube is to prevent the molten metal from .flowing within the pipes.

The shell or tube C may be of hard metal; or it may be formed oif materialmas paperwhich may be afterward reduced to pulp by water or otherliquid llowin g through the pipe.

On the pipes A and B, I fit a casin g, which may be divided. longitudinally and of two parts, D and E, so as to be readily placed' around the pipes preparatory to uniting the pipes and removed therei'rom after the work has been completed. The casing D E has flaring ends l) l), so as to leave at each end a space, c, between the easing and the pipe. The spaces c c, I prefer to lill with asbestus or other material which is a non-conductor of heat. Owing to the flarii'ig ends of the easing and the asbestus therein the pipes will be prevented from being heated to the fusingpoint opposite these ends and outside of the casing.

Heat being applied to the outside of the casing through the middle thereof, opposite the joint a, the pipes may be fused at their ends, the metal flowing together, so that when it is cooled a perfect union of the ends will be effected and one homogeneous pipe formed of the two pipes A and B.

The heat may be applied by means of a flame from gas; but in many cases I iind the device useful which is shown. in the drawings, and by which I may use coal. Said device is in the form of a box having a lower part, F, and an upper part, G, to slide therein. Each of these parts has notches, one, CZ, in each of the opposite sides of the upper part, and one, c, in each of the corresponding sides of the lower part. In the notches of the lower part the casing D .E rests, while the upper partV shuts over the casing, as shown. The notches d c being of a tapering form, casings of various sizes may be held in the openings formed inthe box thereby. By means of bolts f fm one at each side of the boX-and nuts g g thereon the parts of the box may be drawn together, the heads 72y 7i of the bolts bearing against the top of the part G and the nuts against the under side of the part F. The bolts are held in place and slide in tubular guides vi fi at the opposite sides of the part E. By means of the bolts and the two parts of the box the parts of the casing D E are clamped closely together and onto the pipes A and B. There is a door, j, so that coals may be put in the lower part, E. Air may then be forced through a tube, 7s.. Thus the casing D E and the pipes A and B are heated, as required. The gases of combustion may pass out of the box at the tube Z.

Pipes may be joined at a curve or angle in a similar manner, the box having openings for the pipes in two adjoining sides, instead of in opposite sides, as shown in the drawings, and the casing D E being made curved or angular to correspond to the curve or angle formed by the pipes to be joined.

I claim as my inventionM 1. A pipe formed of two soft-metal. pipes placed end to end and united simply by fusing the metal of the pipes at the place of juncture, the diameter of the pipe at the IOO piace of j unctuie being the sume as the diusaid place of juncture a tube conforming to meter of said ends, substantially as set forth. the interior of the pipe, substantially as set 1o 2. A pipe formed of two softmetal pipes forth. placed end to end and united by fusin0x the l j, VV T T 5 metal of the pipe at the place of junctur the VILLIAM A' HEB DERSOb" diametelI of the pipe at the place of juncture Witnesses:

being the same as the diameter of said ends, EDW. DUMMER, and Suid pipe having Within and covering NVILLARD SEARS. 

